For proper clarification of the taxonomy, those species still need the research necessary to provide a good description of the external and internal anatomy of the living animal.

The soft parts of the animals can retract completely or partially into their shells, and yet this offers them scant protection, because the aperture is rather wide and there is no operculum.

The cephalic shield of most species in this superfamily has two hind lobes that lie back on the front of the shell.

These bubble snails have thin, inflated shells ranging in shape from ovoid to flat and oval.

One can often find these bubble snails in enormous numbers, burrowing in mud on intertidal and sublittoral beds of green algae such as for example, the sea lettuce, Ulva lactuca.